Active polymer modification of bitumen for use in roofing materials
US9745473B2 · kind B2 · utility
6Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2016 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Dec 12, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A modified bitumen consisting of a polyurethane wherein the polyisocyanate or polyisocyanate-dominated polyurethane prepolymer (or prepolymers) is first reacted with the bitumen to take advantage of the bitumen's hydroxyl and amine functionality and form an isocyanate-bitumen adduct to form a weatherproofing product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.